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Federal
Heating and Cooling Degree Day by State, 1958–2020 Versus 1895–1957
U.S. Environmental Protection Agency —
This indicator shows how heating and cooling degree days have changed by state, based on a comparison of the first 63 years of available data (1895–1957) with the... -
Federal
Change in Growing Degree Days in the Contiguous 48 States, 1948–2020
U.S. Environmental Protection Agency —
This map shows trends in the total number of growing degree days per year at 305 weather stations . The color and size of the symbols represent percent change between... -
Federal
U.S. Level III and IV Ecoregions (U.S. EPA)
U.S. Environmental Protection Agency —
This map service displays Level III and Level IV Ecoregions of the United States and was created from ecoregion data obtained from the U.S. Environmental Protection...